Case studies

Rebuild of backend of compliance tool

The project

• I was tech lead of the team for four years, responsible for design and implementation of all major efforts
• Full rebuild of the backend of an existing business application
• Changed data model from state-based to event sourcing
• New permissions system based on Google Zanzibar authorisation service
• Introduced far more flexible approach to automated testing
• Brought service into a hexagonal architecture, greatly improving testability and maintainability

Tech stack

• Java
• Google App Engine
• Google Cloud Datastore
• Internal Google platforms

Authorisation service for a multitenant SaaS system managing employee data

The project

• SaaS platform for managing employee data
• Originally built as a monolith; company wanted to migrate to microservices
• Authorisation system was a major blocker: poor latency and tight coupling with data model
• I designed and led the execution of a new authorisation service
• Benefits: greatly reduced latency, enabled decoupling of services from the monolith

Tech stack

• Kotlin
• Spring Boot
• gRPC
• PostgreSQL
• PHP (legacy monolith)

Autoformatter for Kotlin

The project

• Automated and opinionated tool to bring Kotlin code into compliance with the Kotlin coding conventions
• I designed and built this end-to-end
• Available on GitHub

Tech stack

• Kotlin, Kotlin compiler
• Gradle

GoogleTest for Rust

The project

• Test assertion crate for Rust based on the C++ library GoogleTest
• Most powerful test assertion solution available for Rust currently
• Facilitates porting C++ tests in GoogleTest to Rust
• I was responsible for design and most of the implementation
• Available on GitHub and crates.io

Tech stack

• Rust
• Cargo
• GitHub Actions